Greenwood, Susan
Magic, witchcraft and the otherworld: an anthropology
Berg, 2000
 Buku Teks
Ver Steeg, Clarence L.
A People and a nation
Harper and Row, 1981
 Buku Teks
Silberg, Richard
The devolution of the people
Harcourt, Brace & World, 1967
 Buku Teks
Burns, James McGregor
Government by the people
Prentice-Hall, 1972
 Buku Teks
Halsey, George D.
Supervising people
Harper & Brothers, 1946
 Buku Teks